R-1


R-3



R-4



R-6



R-8



R-12, R-16, R-24

The cylinder block (1) crankshaft housing (2), and injector head (3) comprise the body of the Smith MEASUREMIX Model R-8. The water inlet (4) for connection to the water source is threaded to take 2-inch pipe. No strainer is supplied, but a strainer is available as optional equipment and must be used if there is any sand, silt, or other hard abrasive material in your water. The fertilizer intake tube (5) is made of translucent plastic tubing, allowing visual flow check. The intake tube is 10 feet long, but can be supplied longer if desired. The double-ball intake check valve (6) is shown in the picture. The optional single-ball type has a different appearance. The discharge check valve (7) is similar to the intake check valve. The outlet (8) for discharge of water-fertilizer mixture has a 2-inch pipe size. The priming valve (9) lets water into the injector system for easy priming of the injector pump and quick washing of the injector system after operation. The priming valve (10) for the dip tube is also used for shutting off the fertilizer supply during periods when the machine is not in use. The crankshaft windows (11) are made of clear plastic, and are used to observe motion of the crankshaft to be sure it is turning. The check valve insert (12) allows for easy O-ring replacement.

Standard Proportion: 1 to 200
Maximum Water Flow Rate: 100 GPM
Minimum Water Flow Rate: 20 GPM
Connection, Hose or Pipe: 2-inch
The Smith Model R-8 MEASUREMIX is designed for use where the flow of water is between 20 gallons per minute and 100 gallons per minute. The Model R-8 weighs approximately 250 pounds, and is usually installed permanently in a 2-inch pipe line. This model MEASUREMIX is generally specified for larger growing areas where flow of water is substantial. The Model R-8 will operate, however, at 10 GPM, with some sacrifice of accuracy. A number of growers utilize a Model R-8 MEASUREMIX in combination with a Model R-3 MEASUREMIX. With the combination of the two models, a system is capable of handling a flow rate from as little as 3 GPM (one hose) to as much as 100 GPM.

The Smith Model R-8 MEASUREMIX is 19 inches high, 11 inches wide, and 22 inches long. The machine runs smoothly and is heavy enough so that it does not need to be bolted down to any support. Four legs support the Model R-8 MEASUREMIX, which weighs 250 pounds (290 pounds when shipping weight). The connections, both inlet and outlet, are threaded for 2-inch pipe.

STANDARD OPTION
Option F: Includes all stainless steel double-ball check valves with all other valves and fittings of stainless steel, or plastic. Recommended for consistent use with usual inorganic fertilizer mixtures. Contains no rubber parts.

ACID OPTIONS (SPECIAL)
Option P: Contains single-ball check valves with plastic housings and acid-resistant rubber balls. All other items in contact with the fluid are various types of acid-resistant materials. Recommended for units injecting any concentration of sulfuric acid for pH control. (Phosphoric acid may be satisfactorily injected with stainless steel options.) Usually installed as one injector of a two-injector option (see below). For more details write for special sheet AM-3.

ALGICIDE OPTION
Option PS: For use with chlorine and bromine solutions that destroy micro-organisms. Similar to Option P, usually installed as one injector of a two-injector option (see below). For more details write for special sheet AM-17.

PESTICIDE/FUNGICIDE OPTION
Option I: Includes all stainless steel double ball check valves and fittings. Contains no plastic working parts. Recommended for consistent use with the insecticides/fungicides that contain hydrocarbon base harmful to PVC plastics, such as wettable powders and emulsions.
Special proportions: Any of the single-injector options listed above or the two injector options listed below, may be provided with special proportions. Special proportions always available for the R-8 model are 1:400, and 1:500, in addition to the standard 1:200 proportion. For availability of other special proportions, write factory.
Two-injector options: All R-8 machines may be provided with two-injector options. May have one option on one side, another on the other side. Proportions may be different on each side.